JPS633823Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a platen impregnated with ink used in a printer.

Many conventional printers have a structure in which characters and numbers are printed on printing paper by impacting a pressing body from above an ink ribbon. However, these printers require an ink ribbon device, making it difficult to miniaturize the device, and their complicated structure poses problems in terms of reliability and cost. Moreover, since the ink ribbon is interposed between the printing paper and the pressing body, the print quality is not necessarily good.Furthermore, since the ink ribbon is a consumable item, there are problems with operability such as replacing the ink ribbon. It was hot.

In order to improve these shortcomings, in recent years, the ribbon has been abolished and the platen itself is impregnated with ink, and the printing paper is pressed onto the platen using the impact force of the pressing body. A printer is provided. A cover provided with a window is attached to the outer periphery of the platen so that only the portion impacted by the presser on the printing paper is colored and other portions are not stained.

However, as shown in Figure 3, these
Since the printing paper on the cover is pressed down to the surface of the platen by the presser, the moving distance of the presser becomes large, and the printing paper is bent by the thickness of the cover, which may cause the print to become unclear or cause the printing paper to There were drawbacks such as sagging. Furthermore, since the printing paper is curved, it is difficult to print unless the window is enlarged, and if the window is enlarged, the printing paper becomes dirty and the ink evaporates more quickly. There were drawbacks such as getting your hands dirty while inserting and removing the cover when putting it on.

The present invention improves the above-mentioned drawbacks, namely, a case that can be divided vertically in the longitudinal direction and has a plurality of longitudinally elongated rectangular fitting holes arranged in parallel; Almost the same shape as the hole,
A platen main body is inserted into the case with a plurality of protrusions provided at locations corresponding to the fitting holes, and the platen body is inserted into the case with the surface of each protrusion substantially flush with the surface of the case. It is a platen impregnated with

In this case, the surface of the case and the surface of the printing protrusion are almost on the same plane, so that the printing paper is pressed against the platen by the pressing body with almost no bending, and the size of the window is also reduced. This is possible with a small window for only the printing part, and furthermore, when inserting the platen, it is possible to handle the platen itself while it is inserted into one of the divided cases.

The present invention will be explained below with reference to the drawings.

In the embodiment shown in FIG. 1, a platen main body 1 made of a water-absorbing porous material such as a plastic platen or an impregnated metal platen has a rectangular external shape, and has four rectangular surfaces at the center thereof.
A rectangular printing protrusion 2 is provided in each case, and a round hole 3 is provided in each of the axes of both ends. The round hole 3 is provided with a screw hole 4 at its axis,
A cylindrical filling material 5 whose outer diameter is approximately the same as the inner diameter of the round hole 3 is press-fitted and fixed. The hollow rectangular parallelepiped-shaped case 6 has a thickness that is approximately the same as the height of the printing protrusion 2, and the rectangular parallelepiped hollow part is formed to be slightly smaller than the rectangular parallelepiped outer shape of the platen main body 1 so that it can be inserted. In addition, each of the four rectangular surfaces is provided with a rectangular fitting hole 7 that can be fitted with the printing protrusion 2 of the platen main body 1, and the platen main body 1 is inserted into the case 6 and the printing protrusion 2 is inserted into the case 6. Part 2
When the printing protrusion 2 is fitted into the fitting hole 7, the surface of the printing protrusion 2 is located slightly inward from the surface of the case 6, or is formed to be substantially flush with the surface of the case 6. Holes 8 are provided on both end faces of the case 6, and the case 6 is formed by being divided vertically in the longitudinal direction approximately at the center.

The holding plates 9, 9 provided oppositely are connected to the case 6.
L-shaped cam grooves 12 are fixed in parallel at intervals slightly larger than the length of the cam grooves 12 and can hold and move the threaded portion 11 of the set screw 10 that can be screwed into the screw hole 4 of the embedded material 5. is provided.

To attach and print this platen, insert the platen main body 1 into each divided case 6, and
The four printing protrusions 2 are respectively fitted into the four fitting holes 7, and the embedded material 5 is inserted into the platen main body 1 by inserting the threaded portion 11 of the set screw 10 through the cam groove 12 of the holding plates 9, 9. The platen main body 1 is screwed into the screw hole 4 and further inserted into the case 6.
is held on the holding plates 9,9. Next, the printing paper 13 is placed on the surface of the case, and the printing paper is pressed against the printing protrusion 2 of the platen main body 1 by the impact force of the pressing member 14 to print. When the amount of ink impregnated in one printing protrusion 2 decreases, loosen the set screw 10, move it to the lower stage of the cam groove 12, rotate the platen body 1 by 90 degrees, and return to the upper stage of the cam groove 12. , screw in the set screw 10 to fix it, and print on the new printing protrusion. Furthermore, when replacing the platen body 1 itself, remove the set screw 10 and take it out from the retaining plates 9, 9, pull out one side of the case 6, and hold the other side of the case 6 in your hand while leaving the platen body 1 inserted. It can be carried by hand and inserted/removed.

The shape of the platen body and the case may be not only a rectangular parallelepiped but also a polygonal prism or a cylinder, and the case may be divided not only at the center but also at one end. The number of parts and fitting holes does not have to be limited to four. Also,
Instead of embedding the embedding material, a screw hole may be provided in the case or the platen body and a set screw may be fitted therein.

Since the present invention has the above-mentioned configuration, the surface of the printing protrusion and the surface of the case are almost the same surface, which prevents the printing paper from getting dirty and bending, and by making the window smaller, it prevents ink evaporation. At the same time, it became possible to print even if the tip of the printing dot pin in a dot printer or the like had to move very minutely, and it became possible to obtain clear printing, and it became possible to simplify and downsize the device. In addition, it is said that it is preferable to use a water-absorbing porous platen to print over a wide area rather than just in one place, but the work of inserting and removing the ink-impregnated platen body due to the case is often contaminated with ink. However, the device of the present invention can be transported and operated while being inserted into one of the divided cases, so it does not stain hands or other devices, and is easy to operate. Now, you can remove one side of the case, rotate only the platen body 90 degrees, attach the case again, insert it, and print, while holding the platen on the holding plate without creating a cam groove etc. It has various effects.

[Brief explanation of the drawing]

Figure 1 a is a front view showing an embodiment of the present invention, Figure 1 b
is a right side view of figure a, figure c is a sectional view taken along line C-C of figure a, figure d is a perspective view of the platen body, figure e is a perspective view of the case, figure 2 is a conventional platen. FIG. 1... Platen body, 2... Printing protrusion, 6
... Case, 7 ... Fitting hole, 9 ... Holding plate, 10
... Set screw, 12 ... Cam groove, 13 ... Printing paper, 14 ... Pressing body.

Claims (1)

[Scope of utility model registration request] A case that can be divided perpendicularly to the longitudinal direction and has a plurality of longitudinally elongated rectangular fitting holes arranged in parallel, and a part that has approximately the same shape as the fitting holes and corresponds to each of the fitting holes. A platen impregnated with ink, comprising a plurality of protrusions provided on the case, and a platen main body inserted into the case with the surface of each protrusion substantially flush with the surface of the case.